diff --git a/Gemfile b/Gemfile
index 72274f3..a760829 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.5.3'
 gem 'rails', '~> 5.2.4', '>= 5.2.4.3'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 gem 'bootsnap', '>= 1.1.0', require: false
 gem 'fast_jsonapi'
 gem 'figaro'
diff --git a/Gemfile.lock b/Gemfile.lock
index d8b75cf..c34bd69 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -114,7 +114,8 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.5)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.2.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -227,7 +228,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 3.11)
+  puma (~> 4.3)
   rails (~> 5.2.4, >= 5.2.4.3)
   rspec-rails
   rubocop-rails